The direction of induced e.m.f. can be found by
A. Laplace's law
B. Lenz's law
C. Fleming's right hand rule
D. Kirchhoff s voltage law
Answer: Option B
Solution(By Examveda Team)
The direction of induced electromotive force (e.m.f.) can be found by Lenz's law.Lenz's law states that the direction of the induced electromotive force (e.m.f.) in a circuit is such that it opposes the change in magnetic flux that causes it. In other words, when there is a change in magnetic flux passing through a coil or a conductor, an e.m.f. is induced in the conductor in a direction that produces a magnetic field opposing the change in the original magnetic field.
This law helps to understand the direction of the induced current and the polarity of the induced voltage when a magnetic field is changing in a conductor, coil, or any closed-loop circuit. It is a fundamental principle in electromagnetic induction and is used to analyze and predict the behavior of inductors and transformers in electrical and electronic circuits.
This Question Belongs to Electronics And Communications Engineering >> Analog Electronics
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Comments ( 6 )
The action of JFET in its equivalent circuit can best be represented as a
A. Current controlled Current source
B. Current controlled voltage source
C. Voltage controlled voltage source
D. Voltage controlled current source
In a p+n junction diode under reverse bias, the magnitude of electric field is maximum at
A. The edge of the depletion region on the p-side
B. The edge of the depletion region on the n-side
C. The p+n junction
D. The center of the depletion region on the n-side
To prevent a DC return between source and load, it is necessary to use
A. Resistor between source and load
B. Inductor between source and load
C. Capacitor between source and load
D. Either A or B
The Right Answer of this Question is option C . Kindly Correct the answer
Both options B and C are correct
#The answer is both B & C#
Induction happens as a result of flux change upon a conductor. This can happen as per 2 cases mainly.
Case 1. As a result of a varying magnetic flux density on a conductor.
Case 2. Due to a motion of a conductor perpendicular to an existing field, cutting the field lines.
Upon these situations the applicability of the two laws, Lenz law and Flemings' right hand rule depends.
Lenz rule can be easily applied if it is the case 1 and for case 2 Flemings' right hand rule can be applied.
Mohamed Zenith
Bsc. CIvil Engineering (Hons)
University of Moratuwa
Sri Lanka
what determines the direction of induced emf in a conductor or coil
It is c..lenz's law is for induced current.
It is wrong answer.....answer ls flemmings right hand rule